Apparatus for cleaning sacks inside.



C. o. R. HOLMSTRM. APPARATUS FOR CLEANING SAGKS INSIDE.

APPLICATION FILED DEO.18, 1907.

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Patented May 4, 1909.

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APPLICATION FILED DEO. 18,1'907.

Patented May 4, 1909.

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APPARATUS POR GLBANINGSAGKS INSIDE. APPLICATION FILED DEO.18,1807.

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APPARATUS FOR CLEANING SAGKS INSIDE.

APPLIOATION FILED DBO. 1B, 1907.

Patented May 4, 1909.

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APPARATUSFOR CLEANING SACKS INSID.

To all whom t may concern:

Be it known that I, `CARL OsKAR RICHARD HoLMsTnM, asubject of the King of Sweden, and resident of Sliinnarviksgatan 2, Stockholm, in the Kingdom oi Sweden, have invented certain new and useiul Improvements in Apparatus 'for Cleaning Sacks Inside, of which the following is a specihcation, reference being had therein to the accompanying drawings.

This invention relates to an apparatus for cleaning sacks inside. The said apparatus consists, principally, of a number of brushes, two or more sliding` in a suitable frame, over which the sach is threaded.

The accompanying drawings show some forms of the apparatus.

Figures 1, 2 and 3 are a front view, side view and a plan view respectively of an apparatus arranged in accordance with this invention. Fig. 41 is a front view of another form of the apparatus. Figs. 5 and 6 are details of the apparatus shown in Fig. 4. Figs. 7, 8 and 9 are a front view, a plan view and a side view respectively of a third form or the apparatus. Fig. 10 is a detail plan view of a scraper which may be used instead of a brush. Fig. 11 is a central vertical section of the upper part of the apparatus taken along the aXes of the brushes, and Fig. 12 is a transverse vertical section of the same.

The supporting frame, 1, consists of two standards connected by suitable cross bars or braces. ln the top end oi the said frame two lJ-shaped brushes 2, 8 are mounted, sliding horizontally in opposite directions in grooves or guides 31, provided in the frame 1, the bristles oi the said brushes being directed laterally from the frame. To the brushes 2, 3, 1 secure the ends of cords, 5, which pass from the brushes across the frame to and over pulleys 6 and then downward to an operating lever, 7, i'ulcrumed on the frame. By reason or' this arrangement, when the cords are drawn downward by means of the lever 7, the brush 2 is moved outward to the left and the'brush 3 outward to the right against thev tension of springs 8, which are ixed, inside the brushes, to cross pieces 4 thereoi` and to the frame 1 and keep the brushes in their inner position, shown in Figs. 1 and 3. On the top end of the `frame 1 a third brush 9 is mounted, sliding in the top guide 81, parallel to the brushes 2 and 3. The bristles of the said brush 9 are directed upward. rlhe said brush 9 is connected with the lever 7 by a Speoication of Letters Patent.

Application filed December 18, 1907.

Patented May 1, 1909.

Serial No. l107,081.

string 10, passing over a pulley 11, journaled in the frame 1, so that when pulling on the string 10 by means ol: the lever 7, the brush 9 is moved in one direction, toward the left, Figs. 1 and 3. A spring 12, fixed in the brush 9 and the frame 1 acts upon the brush in the opposite direction. The lever 7 is shown in Figs. 1, 2 and 3 as a hand lever provided with a spring latch 13, which can be brought into engagement with notches 14 provided in a curve shaped rod 15 fixed to the frame 1, so that the lever 7 can be held in any desired position.

The cleaning of a sack by means of the described apparatus is eected in the following manner. The sack is inverted over the frame 1. The lever 7 is lightly moved upward and downward, and, acting in opposition to the spring 12, moves the brush 9 forward and backward, so that the bottom of the sach is brushed. Finally the lever is moved down as far as permitted by the sack, against the sides of which the brushes 2, 3 are forced, and is locked in the said position by the catch 13, engaging a notch in the rod 15. The sack is then drawn upward Yfrom the frame, during which operation its inner sides are brushed by the brushes 2, 3, bearing against the same. lnstead of moving the brush 9 forward and backward, by means of the lever 7, the brush may be stationary and the sack moved normally forward and fbaclward sidewise. The material, removed from the sach in the described manner, is gathered in a receptacle A, in which the apparatus is mounted. v

1n the form of the apparatus shown in Figs. 1, 5 and 6 four small brushes 16 are rigv idly iiXed in the top end of, the frame l, the bristles oi' the said Vbrushes being directed upward. VThe U-shaped brushes 2 and 3, the bristles of which are 'directed' outward, are each connected with the upper end of a twoarmed lever. T he said levers 17, 18 swing on horizontal pins 19 in a central head 20, which head by means of the said pins is journaled in cross pieces 21,'iXed to the frame 1, `one to each side of the same as 'shown-most clearly in Fig. 6. At some distance from the said pins 19 the lower arms of the levers 17, 18 are bent outward, so that the lower end of each lever is in or substantially in thesame vertical line as the top end of the other lever. Owing to this arrangement the lower arms of the levers form a concave bearing surface 22, 23 respectively. Rollers 24., 25 respectively,

provided with grooves in their peripheries, bear against the said surfaces, the said rollers being mounted on pins 26, 27 respectively, projecting from a common cross piece 28, which is fixed on a vertical rod 29, sliding in a central hole in the said head 20. The lower end of the rod 29 is connected with alever 30, which lever is normally held in an upper position by a spring 31. When the lever 3() is forced downward, the rod 29 is pulled downward, forcing the rollers 24, 25 against the lower ends of the levers 17, 18, so that the said ends are swung inward toward the vertical center line of the frame 1 and the top ends of the levers in the opposite direction, forcing the brushes 2, 3 outward against the inner sides of a sack, previously drawn down over the frame 1. When the lever 30 is released, the spring 31, acting upon the same, raises the lever and the rod 29 with the said rollers, so that springs 32, 'lixed to the upper arms of the levers 17, 18 and the frame 1, can move the levers and the brushes 2, 3 to their normal positions.

In the form of the apparatus shown in Figs. 7, 8 and 9 the frame 1 is formed of U- shaped or channel bars, the langes of which are directed outward. ln the grooves presented by the iianges of the said bars the side pieces of a frame 34 are slidably mounted. On the horizontal top piece of the said frame 34 brushes 16 are iixed, the bristles of which are directed upward. The frame 34 is connected with a forked lever 36 by means of links 35, one on each side of the frame, which lever 36 swings on a shaft 37, fixed in two uprights 38. The said uprights are xed on a base plate 39 on which the frame 1 also is fixed. The rear end of the lever 36 is bent downward and strong spiral springs 41 are fixed to the said end and to hooks 49, iixed to the base plate 39 and tending to swing the front, forked end of the lever 36 upward and consequently to force the frame 34 upward. A rod 43, provided with handles 42 is fixed to the lever 36, said rod extending across the said lever. In the base plate a catch 44 is pivoted, which can engage the lever 36 and has an arm 45 directed forward. The said arm is located below the treadle 30, which by means of the rod 29, the rollers 24, 25 and the levers 17, 18 can act upon the sliding brushes 2 and 3 in the same manner as in the apparatus shown in Figs. 4 and 5. To the lower end of the sliding frame 34 are fixed substantially semicircular, horizontal bar-engaging brackets 46, which are adjustable vertically as well as toward and from the frame. For that purpose each bracket has an arm 47 projecting downward and projecting through a holder 49, provided with a set-screw 48 arranged to bear against said arm 47 and thereby hold the bracket at any point to which it may be adjusted vertically. The said holder has a longitudinal slot 50, through which a screw bolt 52 is threaded, the said screwbolt being mounted in a projection 51 on the frame 34 and provided with a nut, by means of which the holder can be iixed inadjusted position. The said brackets 46 are provided with hooks or points 53, directed downward.

For the cleaning of a sack by means ol the apparatus shown in Figs. 7 to 9 inclusively one proceeds in the following manner. rlhe sack is drawn over the frame 1, after the frame 34, the lever 36 and parts connected with the same have been moved to their lower position, indicated by dotted lines in Fig. 9, in which position the parts are held by the catch 44 engaging the lever 36. The sack is drawn over the brackets 46 and hooked on the points 53 on the saine, the sack being thus held in position by the said points. rlhe treadle 30 is then forced downward, causing by means of the levers 17, 18 the brushes 2, 3 to move outward against the inner sides of the sack. As the treadle 30 is forced downward, it strikes the arm 45 of the catch 44 and swings the same out of engagement with the lever 36. The springs 41 then swing the lever 36 upward, so that the frame 34 with the sack is forced upward, the sack being thus brushed inside by the stationary brushes 2, 3. lf the said brushing is not sullicient, the lever 36 is depressed two or more times and forced upward at each time by the springs 41. After the sack has been cleaned in the described manner it is disconnected from the pieces 46 and drawn 'from the frame 34. In some cases Scrapers may be substituted for the said brushes 2, 3 for cleaning the sacks. Such a scraper is shown in Fig. 1() in a plan view. The said scraper consists of av U-shaped plate 54, which is mounted in the frame 1 or 34 in the saine manner as the brushes 2 and 3. A U-shaped scraper 56 of sheet metal is iixed to the plate 54 by means oll leaf springs 55. The said scrapers are forced outward against the inside of the sack, drawn over the frame, in the same manner as the sliding brushes 2 and 3, described above, and clean the sack, when drawn upward very eHectively.

Having now described my invention, what l claim as new and desire to secure by Letters Patent is:

1. In an apparatus for cleaning sacks inside, the combination of an upright frame, over which the sack is drawn, cleaning means sliding transversely to the frame in guides, provided at the top end of the same, and

means for moving the said cleaning means,

means lor moving the said cleaning means outward in opposition to the said springs.

3. In an apparatus lor cleaning sacks, the combination oll a supporting i'rame over which the sack is drawn, cleaning means mounted to slide transversely upon the frame, springs attached to the cleaning means and the frame to hold the said cleaning means normally inward upon the frame, an operating lever, and connections between the said lever and the cleaning means to move the said cleaning means in opposition to the said springs.

e. In an apparatus for cleaning sacks, the combination of a supporting frame, cleaning means mounted to slide transversely upon said frame, springs acting upon the said cleaning means to hold them normally inward upon Vthe frame, an operating lever, a pair of levers attached to the cleaning means, and connections between the said pair of levers and the operating lever whereby the said pair of levers may be oscillated to move the cleaning means outward on the frame.l

5. In an apparatus for cleaning saclrs, the combination of a suitable supporting frame, cleaning means mounted to slide transversely upon said frame, an operating lever, springs arranged on the frame to hold the cleaning means normally inward, cross levers fulcrumed at a common point on the frame and attached to the cleaning means, and a sliding rod pivotally connected to the operating lever and provided with means to vibrate the crossed levers whereby the cleaning means will be moved outward cn the frame.

6. In an apparatus for cleaning sacks, the combination with a supporting frame, of a vertically sliding frame mounted on the supporting frame and provided at its upper end with a cleaner, movable cleaning means mounted on the supporting frame, means for reciprocating said cleaning means transversely of the supporting frame, means for moving the vertically sliding frame, and means for locking the said vertically sliding frame in its lowest position.

7. In an apparatus for cleaning sacks, the combination of a supporting frame, a slidn able frame mounted thereon and provided with a cleaner at its upper end, cleaning means mounted on the supporting frame, means for reciprocating said cleaning means upon the sup orting frame, means for moving the slidab e frame, means for locking the said slidable frame in its lowest position, and

4an actuating device connected with the means for operating the movable cleaning means and arranged to automatically release the said locking means.

8. In an apparatus for cleaning sacks, the combination of a supporting frame, a ver tically movable frame mounted on the supporting frame, a cleaner at the upper end of said vertically movable frame, cleaners on the supporting frame, means for moving the said vertically sliding frame, and adjustable sack-holding brackets on the supporting frame.

9. In an apparatus for cleaning sacks, the combination of a supporting frame, a vertically movable frame mounted thereon, cleaning means on both frames, an oscillating lever, links connecting said lever with the vertically sliding frame, springs acting on said lever to hold the same normally raised7 and a latch arranged to engage the said lever and hold it in its lowest position.

10. In an apparatus for cleaning sacks, the combination of a frame over which a sack maybe drawn and provided with transverse grooves in its sides, brushes itted in said grooves, and means for reciprocating said brushes.

11. In an apparatus for cleaning sacks, the combination of a frame over which a sack may be drawn and provided with transverse grooves in its sides, U-shaped cleaning devices 'litted in the said grooves, and means for reciprocating said cleaning devices.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

Call-L OSKAR RICHARD HOLMSTRM.

Witnesses CARL FRiBERG, HJALMAR ZnTTnnsrnoM. 

